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Application filed by Wlodzimierz LawaczfiledCriticalWlodzimierz Lawacz
Priority to PL30946895ApriorityCriticalpatent/PL179235B1/en
Publication of PL309468A1publicationCriticalpatent/PL309468A1/en
Publication of PL179235B1publicationCriticalpatent/PL179235B1/en
Method of chemically treating municipal sewage in small treatment plants and apparatus for meteringly adding chemical substances used in such treatment